Here is one near me, it is bigger than what you mentioned (and could probably tow with your vehicle now). it has been advertized for a while, so seller would probably take less. You could probably get the seller to deliver to your location so you could begin using it sooner. I know it is a long ways from Dalton, but other than length, I think it would work for your needs. I have a Jayflight and have been very pleased with quality. They are green certified (so less likely to cause allergy issues).
You could take bunks on street side out and use area for recliners, rockers or whatever you want. Since their is an outside kitchen, you could tap those water lines to put washer/dryer in bunk room.
Strongly recommend that you have 30 or 50 amp service put in at your MIL's. If you have a correctly sized service plug, you will not need generator. Your TT will run on A/C's on it's electric service plug. You only need a generator is you are staying somewhere without enough electric service.