We have upgraded the bathroom with new sink/vanity and retiled the shower/tub area.

I believe I have broken the goals down into obtainable steps.

If I chose multifamily properties the goal would be to upgrade over time to larger complexes, if I chose single-family properties then the goal would be to hold on for a long time. 

I live in the home for a few years, and during that time I do upgrades on the home, and at the same time save money to be able to put money down on another property.

Builders have already broken ground on 1.6M multifamily units nationwide, and millions more in the Single Family space.

I put $64K into it, new roof, upgraded to 200 amp electrical, rewired 100%, all new plumbing, beautiful original hardwood floors sanded and polyurethaned, tile in bathroom and laundry room.

HR Tax Cut has an upgraded software program specifically for rental properties. 

Very good takes here on this thread @Matthew Kwan @Carlos ValenciaI think whether you're looking to approach real estate as an investor (owner operator) or as a business or active cashflow (operating business like flipping/fix/turn keys/wholesaling/RE agent/broker/lender/etc) it will vary some of the replies here are from people operating businesses and some are from BRRR/House hack investors who are starting out.Somewhere in between will lie your fine balance between both.For myself i've generated earnings and income through lending and have reinvested them into real estate in a market with rental income and value upside by buying lower than "as is," or intrinsic value when I can and improving that value through upgrades, rental raises, and added services.

If broken once, twice, ..thirty times, then what?

This is with an upgraded finish package, and nice landscaping.That number can go up or down by 20% depending on condition of roof, HVAC, sewer.