I never thought of screening for this.Also, I'm wondering if it's safe for us to accept an out of state DL.

I agree with Bill's suggestion regarding requesting tax returns and bank statements.

I've had a couple of people suggest to me to 1031 exchange my SFH here to buy multi-unit OOS or many SFHs...sounds like huge headache venturing into the unknown and all those tenants, repairs, capital expenses etc. 

There are a lot of areas that are perfect for investing but a few that are not so great, and I would suggest avoiding.

One way to think about it could be to tokenize the properties and have the shareholders hold tokens in these properties combined with the right to use the properties that have shares in.I wonder how you would want to make sure that the numbers work. if it is just a matter of a number of people sharing the properties with each other, you could just do that on AirBnB, but if there ownership is to go farther, some more details would need to be revealed.Based on what you have described, I don;t really see an incentive for any investor to do a deal like that when staying in other countries can be done with VRBO or hotels, or AirBnB, or many other options.

I’ve seen others mention about building a team and I am wondering who would I need for my strategy.

I strongly suggest you create an LLC for each investment property you have that way if the loan goes sideways and they have to foreclose, they can only go after the specific asset and not your whole portfolio. 

The formula for calculating DSCR is straightforward:DSCR=NetOperatingIncome(NOI)/TotalDebtServiceNet Operating Income (NOI) represents the property's income after operating expenses.Total Debt Service includes all debt obligations, such as loan payments, property taxes, and insurance.A DSCR ratio above 1 indicates that the property's income is sufficient to cover its debt obligations, while a ratio below 1 suggests insufficient cash flow to cover debt payments.Lenders usually have specific DSCR requirements, with higher ratios indicating lower risk for the lender.

If you are currently living in it, why not finish the basement and then either rent out that space or do as you suggested and you move downstairs and rent the rest of the house out? 

We suggested they start a business and buy through the business name but aren't sure about that either.