Charles here is what I have setup and is working amazing for me over the last 3.4 years specifically. We are similar in that I started a homebuilding company in 2009 and have been a residential developer for nearly 20 years . Far and away I favor investing in SFR over all other facets of our companies .
1.) Shop a commercial lender preferably a community bank or similar with assets of under 1B as they have more flexibility. I recommend minimum 2/3 although you may already have contacts from your previous experience which if this is the case a no brainer to reestablish those relationships.
2.) Obtain 2 lines of credit - first one is for cash purchases only.Eg... I went under contract on a SFR Friday after T giving for 65k which I close this Thursday. Bank giving me the entire 65k . I put in 8-10k myself take me about 2 weeks all cosmetic work.
3.) Obtain 2nd LOC for 5-7 year commercial loans. In the case above the home will appraise for 90k . I pay the 65 off the first LOC, get 7k back out of my 8-10 k and then repeat. Rarely do I not get all my rehab money back as bank gives me 80% of appraised value or 100% of my costs whichever is lower. In this case deal way too ez to pass up.
Important to know a few things IMHO about myself and other posts on this thread. Charles I disagree with the partner approach as you already have funds and skillset .Next its' Way way too difficult to obtain secondary market money in my situation and it sounds like where you wish to be by scaling. Several reasons for this - low W-2 / AGI vs commercial lenders add back in depreciation -giving etc...Unsure about secondary market financing. Next is the speed of which you wish to scale. If your wanting 1/2 props / year than secondary market may work. If not then commercial loans ignore the 6 month waiting period for you to get your rehab funds back -
Simply put apply 1-3 and then repeat. We now have purchased about 35 over the last few years sold a small amount and now are sitting around 30. Avg cash flow / door is $300/ month. All loans are on now 6/13 fully amortized loans. All bc props no section 8 props. I also am now building on duplex lots I purchased during the correction from a lender and am developing 4 family rentals. Again a no brainer with your skillset and background IMHO.
Let me know how it works out - best wishes moving forward.