If you know anything about duplex builders (most seem to be single family only?)

Plan to buy at 4 duplex and a single family(which includes a lot) this year.

You could do General Contracting where you'd need knowledge of all trades or manage a team of one single trade. 

If your property is residential single-family owner-occupied in a good area, the buyer has good credit, made a good down payment, and twelve or more on-time payments have been made, you'll be in the lower range.Note buyers, just like lenders, won't go above a certain loan-to-value (LTV) ratio.

I am going to be lending to an investor on a single family home.

I remember watching ‘gurus’ talk about how you could make $5,000, $10,000 or $20,000 on a single deal.

I got comment to submit a single plan.

Wonder what they charge developers to access their capital resources.   

You can get solid cash-flowing single families in the 90-120k price range and duplexes in the 130-180k price range.

Quote from @Aaron Wolman: Yes, these charges are fair.