It only depends on your bandwidth and expertise.

I'm willing to seller finance 3 former model homes, with clean titles, no structural issues, turnkey investments that are fully paid for, in a sought after area. 

For example, if an investor wants to rehab a house and net at least $18,000 after accounting for factors such as holding costs, closing costs, and real estate agent commissions, other models are a viable alternative to the 70% “rule.”Is the 70% Rule a Good Guideline?

That is a very poor business model.

I contacted a title agent, and used her expertise to find an investor friendly agent, a lender who could close, insurance etc.

While introducing our business model to the members on the table, a very established broker was shocked what we were doing (assignment of contract).

Last- don't feel like you have to do it alone- partnering with someone once you get to know a few folks with complimentary skill sets or things they can offer (time, expertise, money) can be a great way to work. 

However, it does demand solid digital marketing expertise to see positive results.

Looking to link up with a few people to chat systems, whats working / whats not, planning for future business model changes etc.

However, it does require solid expertise in digital marketing to achieve positive results.