I have had a different route and went from SFRs to MHPs since those are a better fit more my knowledge, skills, and abilities. 

So from a strategy of maximizing your ability to leverage, this allows you to keep as much money as possible free to buy more investment properties. 

However, I am less confident in my ability to find it.

Also I have the ability to use a VA loan for my primary so I would not need to put any money down on new primary. 

As far as updated, I’m confident in my own ability to do minor upgrades and I have contacts for electrical work if needed.

@Frank Yaccarino To add more to the conversation you need good or even great negotiating skills, the ability to estimate repairs (or know a contractor who can), a way to get accurate comparables, time, and dedication. 

Development is a complicated business, the more knowledge you can acquire with more velocity improves your ability to increase your income.Personally, my best days were when I would be tasked with managing a project (or part of it) and could at the end of the day ask a TON of questions about how to do it, what happened, what went wrong, what could be done better, and what could be done better than anyone else.

It takes a lot of hard work and mistakes but income potential is only limited by your ability to learn new skills and put in the work.

The cool part of seller finance is the ability to work out terms that can make properties profitable for different scenarios.  

You will want to make sure you are very confident in your ability to find good deals, get the appropriate financing, and manage the property.