If you do the math, since your borrower is paying interest on interest, it raises your effective interest rate by about a point.

Are there any discounts or perks for maintaining multiple accounts?

Have a close watch on weeds, and keep local farmers motivated to maintain land fertility and accelerate plant growth rate

Are there any other effective platforms for West Sacramento or Northern California?

I am an investor and also own a handyman service that rehabs and maintains all of our properties. 

What type of properties are these and what do you mean by it not being "cost-effective" for you?

Market crash is the problem for the house flippers if they pay too much price.If you are making good cash flow, market price doesn't have any effect on you unless you will need to sell the house.

Use landscape rock it will last longer  vs mulch ,buy perennial plants that can be easy to maintain .The old power washer can work wonders on a siding be careful with it .Front door is BIG take a hard look at it .

Otherwise it doesn't worth the hassle of maintaining duplex.

However, my concern is how to effectively spend ~$750K via 1031 as a first time REI without A.) making an unwise investment because I'm rushed and relocating my family of six and B.)