I’ve bought multiple properties using RTR and have never felt predatory.

If you do the deal, ensure you have your property taxes set aside, because with seller financing there is not an impound process to handle the taxes and insurance. 

Generally - the depreciation on the structure, mortgage interest, property taxes, repairs & maintenance, insurance, property manager, utilities, vehicle expenses (mileage), professional fees (reports/CPA), home office (office supplies, percentage of utilities, continuing education).

My goal is to help people invest in properties and grow my business, but as a beginner, I'd love some advice on getting my foot in the door. 

Purchase price: $550,000 Cash invested: $145,000 Sale price: $915,000 This was a home run for a long term (5 years) buy & hold investment property (I specialize in this area). - Initial investment of $145K (DP+closing)- It had one tenant for 5 years and 3 months (no turnover), and the tenant paid off the mortgage and expenses in those 5 years.- I spent around $30K to do upgrades before selling.- Sold it for $915K after 5.5 years (received $442K at the closing)- Did 1031 exchange and bought 8 SFH in NE & AL worth of 1.6M (brings $4k/months income now) What made you interested in investing in this type of deal?

We are Canadians eyeing up the market in the USA and looking to start investing in properties across the border. 

My short term goal(s) in the next few years are to have 4-5 properties (long term), as well as a multi family home.

Are you looking to acquire more S8 properties?

.: REI nation is a reputed turnkey provider but they just sent me pictures of the property and asked me to choose.

If you want to stay in your house, then your only option would be to leverage equity which will probably be in the 8-10% interest rate range.Not knowing the entire situation, I think you could consider downsizing and then using the proceeds to buy a 2-4 unit property and start making $40-75K right away with still no debt.