I think an Airbnb will be one of the first things to lose if the market goes down but a rental is a proven type but you'll probably need about 20 SFH's to get where you want to be to pay your monthly expenses. 

The good news is that you have an established tenant, with a proven record of profitability, and tons of equity. 

I track my prospective tenant inquiries on a spreadsheet and about 75% came from Craigslist and the rest from the physical sign outside of the property or Cozy's partner sites.

@Lynette Gryniak expect that, in general, nearly all underwriters (conventional or government guaranteed) are going to want to track down the original source of funds for the previous 60 days that are larger than about 2% of the total cost.

Inexperienced investors tend to (1) get exited about deals without having the experience, knowledge or ability to properly determine if indeed the deal is good, bad or mediocre, (2) take what the seller says as gospel not realizing most sellers will exaggerate, lie and or withhold vital information to get what they want, (3) engage people who will provide opinions for free rather than pay a competent professional, (4) get emotionally caught up in the deal and very defensive when receiving an opinion or information that doesn’t support their dream, and rationalize that more experienced people who point out flaws are “jealous, negative or haters”.Btw, no one can provide any knowledgeable answers to your questions without first analyzing the deal, your ability to come up with a down payment, your credit capacity and banking relations, if you have a track record, your experience with similar property ownership, etc.

Or they have a ton of money because they are an investor and keeping 10-15% of a $100k property to owner finance to someone probably isn't worth it in the time it takes to keep track of, not to mention the bank may not like that if you go with a traditional loan.

Also I know from other investors advice and SMs I know that having houses spread out is tough to manage/keep track of.

@Ronald Rohde oh man, it was painful just to open a simple checking account, like they don't want to take my money... one even asked for articles of formation for each cell (which of course is not possible)... kinda OCD when tracking my documents thankfully, do you have any preferred lender here in Dallas? 

There are far better investors with actual track records of investing with books about investing who offer down to earth, tried and true strategies. 

I prefer to get a google voice number and link it to my cell so that that is the number the tenants know and use rather than giving out my personal cell.Have some means of tracking income and expenses for reporting and tax purposes.My state doesn't require a separate bank account for deposit so I just have the single account for income, expenses, and deposits.1 SFH shouldn't be any problem at all.