That is a lot of MoHome for the $.
Looks good from the pics they took, as well as the video.
Some of the other earlier posts have covered pretty well what to look for in detail. Bit after maybe 2 months of ownership, I've had a pretty steep learning curve...
At 26 years old, unless the owner was anal or an engineer (I'm both, so I can say that...:-)) , there are going to be ...things... that need doing.
"Some weather cracks" means you will prolly need tires - about $250 ea.
Look carefully at the roof: ours had multiple layers of Dicor - it did not leak, but will soon - and looks like heck. Good news is that the fan that "just needs some lubrication" will need replacing, and then you can do the sealing as well.
Some original fixtures you may want to replace pronto - like the (for us) 20 year old plastic head that was designed for a 4 year old's height..
We tend to boondock - so a mechanical failure out of cell phone range could have tough ramifications when you have 60+ years on your personal chassis..
. I budgeted about $3k to replace every normal wearing engine part on our 96 LY30 with 73000 on her - starter, master cylinder, brake booster, ball joints, bell cranks, sway bar bushings, brake pads, shocks, wheel bearings, radiator hoses, water pump, brake hoses, brake cables, plug wires, power steering pump, etc, etc, etc. After a couple months (we still work full time day jobs) we are just about done.
Pay particular attention to the walls - as you indicated. Tap all around (small rubber mallet) the coach, in different light conditions. Have a friend help. Above the wheels I can almost guarantee some delam - that seems pretty typical. Do this area first and you will know what to hear for...
And, the fricken autopark. Does it work? And how? There are several different versions of the POS out there. GM's worst idea ever. If the drum on the driveshaft is not too greasy, hit it with a good light and look for blue steel where the pads ride on the outside. Which would mean it engaged whilst driving, (or some gomer just forgot to dis-engage it). Also, put it in autopark, and try to drive away. It should not. It may also surge, if the drum has been heated up to egg shaped. But if it does move, either the cable is out of adjustment, or the pads are gone, or the tranny rear seal has lubed up shoes, or the hydro motor is weak, or a few other failure modes. If you are relatively mechanically inclined, it is not too hard to work on: it is just an ill designed, failure prone mechanism that should have been designed as a life safety item - but was apparently given less actual thought to than placement of the cupholders...
I've just finished putting in new shoes and a new drum in ours - as well as a new tranny seal.. all three items were buggered...
If you do get it, your first purchase should be a set of chocks at camping world... to give you a Plan B when the autopark fails... and then a bonafide Shop Manual from ebay.
Good luck with the purchase - the MoHome does show really well. Hopefully the PO kept a maintenance log?
Oh - and it would be helpful to post some pics on the site: very soon that link will be dead - and having a good looking 36 LY pics may help out somebody else.