I'm not an expert, but it will really depend on your tax needs.   

Depending on the location, space looks great as is!

Most lenders can go up to 75%-80% LTV depending on experience and fico score. 

If you're married but your spouse does not work and is on your primary mortgage there are still ways to work around this.Seem appropriate to say I am NOT a lender but I do have a fair bit of knowledge on this as my wife and I own 12-doors in Detroit but live in CA.Beyond the fact that you could have 20 conventional mortgages between you and a spouse, how you should proceed is dependent on your goals.Would 10 SFH's be "enough" to reach your goals?

@Olga Daisel It depends if you are looking for a full doc, lite doc or no doc program.

It depends on your strategy: are you looking to do a long-term rental or short-term?

While it depends on your financial position, I would recommend working with a conventional or DSCR lender and/or exploring the option of utilizing a HELOC. 

This depends on the lender's policies, the property value and your overall financial situation. 

Less dependence on online travel agencies (OTAs) like Airbnb and VRBO, more people booking directly with you leads to increased profits.

There are plenty of more ways to find deals and I could go on forever just depends on what your goals are