What state are you in? Those are two very different scenarios, each one requiring a massive commitment and so hopefully something you really want to do. An RV full time can equal the cost of renting an apartment or home. There's not only the payment, but fuel costs to meet all the additional miles driven. I spend around $200 /mo. on gas just tooling around locally.. an RV around the US might be, $600 or more? Hard to estimate. And also figure in repairs. There's a learning curve for hookups, cost of parking spaces, etc. that could benefit from weeks or months of research before plunging in. But there is a ton of online support, RV groups etc. As a DAV, you can likely get reduced or free parking or discounts some places.
VA home loans are less restrictive than most.., you can have a lower credit score (I think low 600s is their criteria), and higher DTI. If you meet residual income requirements, you can have DTI 50% or more. So a VA loan might be easier than an RV right now. As far as renting, I put up shelving, pictures, and even mount my TV in wall studs without worrying. A little spackle and I can't even see where the holes were. But have you asked Smokey about all this? 
