This sounds like an above average number of miles, entry level class C, for a below average price. I think you could probably find a better deal on a slightly older coach, with fewer miles.
Though condition of coach aside, my concern is your talk of budget, and what you can afford. Traveling by motorhome is not cheap, even when well maintained they break down, have flat tires, etc.
Let me share some of my personal experience as a guideline, my current coach is what I consider a well maintained 2002 model with about 85,000 miles on it, I bought when it was at 74,000 miles in 2016. The previous owner had done over $3,000 worth of front end suspension work on it in March of 2015 when it was at about 56,000 miles, doing all the suggested work that was needed based on an inspection by a nationally well regarded shop (I have copies of the paperwork). He also had put another $7,000+ worth of parts alone that were into it since 2014, including new tires, refrigerator, carpet, seats, batteries, inverter, solar panels, tv, stereo, backup camera,...
Since buying the coach in 2016 for about $20,000 I have spent close to $10,000 on provisioning (pots, pans, bbq grill, camping chairs, sheets, towels,..), maintenance (fluid changes, 1 tire, coach and chassis batteries, signal lights), as well as updates (TPMS, GPS, new shocks, LED lights,...) Sure I could have trimmed that a good bit, but still somewhere between $3,500 - $5,000 would have been what I consider necessary / good preventive maintenance items (like changing the oil). Of that about about $2,200 has went to professional shops, most recently 3 months ago I had a hydraulic hard line for the automatic parking brake fail and leave me stranded on the side of the road, shop cost associating the repair / fabricating a new line ran about $600. This does not include other cost of ownership stuff, like insurance, roadside assistance plans, ...
On my most recent trip about a month ago I had one of the front suspension air bags that were installed in March of 2015 fail while I was 500 miles from home. I was able to replace it myself in a campground, but it did cost me an unexpected $260 or so which included $30 spent on tools that I needed for the job, but did not have in my tool box, and $70 to next day air the part, .... On the drive home I started hearing a clack from the front suspension when going around sharp curves at low speed, I took it into a local trusted shop last week where they diagnosed that it now needs to have the upper and lower ball joints to be replaced on both sides, cost estimate $1,090, plus afterward it will need a front end alignment, which they can't do. The nearest shop capable of doing a front end alignment is 50 miles away, and that will likely run another $170, plus travel expense (100 miles round trip at 9 mpg, will amount to over $30 in fuel alone).
Not all trips are this eventful, though this last one did have its share, also on this trip the power seat control switch on the passenger seat also failed leaving my wife riding with the seat in the forward most position for most of the drive home, this was a $35 fix thanks to a used power seat switch off ebay and about an hour of my time, a bit of sheet metal on the front air scoop lost its rivets and began flapping around mid way on the trip (I know they were fine when I had looked at them 5 or 6 months ago, as I was considering drilling them out to get access to a component), another easy fix, though I did spend yet another hour in another camp ground fixing it, thankfully I had my $15 rivet gun with me, who knows what a shop would have charged if I did not have the tools and skills to fix it myself. On top of all that the engine was making a strange sound that I have yet to identify on the drive home, which of course it stopped making before I could take it into a shop to get a professional opinion.
