From that I learned to make them send proof of funds for down payment and closing costs before accepting any offers.

I didn't have a problem with it until they were unable to provide proof of employment for him.

Some things to consider, will those things be renter proof if there’s such a thing.  

Is that how the ampersand symbol is displayed to you?

Please be prepared to show proof of funds and provide attorney contact.

If I have the enough capital (5-10%) & proof of income will this persuade the broker to give me a mortgage?

Yes.Brandon Turner and Ben Lebovich have done it, so there is proof, but your path of least resistance is to grind out the 9-5 and get some conventional loans going, at least to get started. 10-15 years from now, you'll probably be able to leave the grind and be in a position where you don't need conventional loans anymore.

If I have the enough capital (5-10%) & proof of income will this persuade the broker to give me a mortgage?

Just because people are "possibly" looking to stay at your place, there isn't any detail information beyond this semi-arbitrary number that AirBnb displays. 

I look back on 2018 seeing what we’ve accomplished, 124 deals, nearly 200 properties, and 231 total doors (after next week), I’ve been to 5 countries and 13 different states this year educating myself, speaking, building partnerships, raising capital and purchasing real estate.I say this to hopefully bring encouragement, an urgency to take action, and proof that you can be successful in real estate no matter your background, current financial position, or walk of life.