@Caleb HeimsothI agree mostly. the loans can be managed with a savvy plan.The delayed income is brutal tho compared to other fields.

You could follow the delayed financing rules and get your initial investment back up to 75% of value.

I have a 3 bedroom SFR on the east side of Plainfield that we have been marketing for 21 days with minimal interest and I'm wondering if it has more to do with the time of the year or other factors? 

With a little planning, you can minimize any negatives. 

Very minimal stuff can be done by the homeowner, as long as you get certified by taking an online test.

I have very minimal capital to start.

You can do this sooner with delayed financing if you paid cash - with the restriction of pulling out a max of the purchase price plus closing costs prior to 6 months.

So my experience is minimal.  

Is it just the time delay in getting paid?

Find a lender who has competitive rates, great response time minimal junk fees and who you can establish a good working relationship with.