Some behavior you want to exclude right off the bat for sure - smokers, etc - and I don't disagree with your premise that I don't think I'd want that situation under my own roof - but if a person is not breaking any law, you have to either let them do what they want within reason or let them seek accomodations elsewhere.

Bedroom needs to be 100 sq ft to accomodate 2 people according to the "rules".

The solution may be to find a modular builder that will accomodate "tiny"  200-800 sqft.

We've entertained the idea of getting into real estate investing, I proposed the following plan with my limited knowledge:     Step1: Move to a bigger house to accomodate our bigger family (2 kids) price range 400k-550k, use a VA loan for this second home to minimize downpayment, I have 10% disability so no funding fee.

But we know the score private folks may not be as accomodating as we are. 

I think it might be hard to accomodate for 3-5 years out.

In other cases, I have made a lower offer to start, and negotiated on up to H&B (if necessary) and never above that.To sum it up, each situation is different and your stratgey needs to accomodate the situation.

There have to be some upfront conditions or else they can't be accomodated.

Understand that private money may not always be available.I'm not a fan of putting all I have with any one lender, banks do fail and new holders may not be as accomodating, but that depends on how much you're dumping into one lender too.The biggest concern with blanket loans are the terms of release for each property secured!

Then, you travel someplace where you pay accomodations, travel and your own expenses (some of them may be deductible in whole or in part - consult your financial professional, I'm not one).