After the new year I plan on doing a very small scale, slow direct mailing / calling on currently off market multifamily properties.

If you can take some of that “earned” capital and scale the investment you’re on your way to building that times over (if that is part of your plan).

That’s a nice scale for measuring general expectations.

I’m trying my best to scale but the options appear vast, please advise.

Sometimes you can get 4-6% cash back (generally limited to hard cap $ amount).Then if you're really into it... look up manufactured spend.

It may be important to realize that you have created general partnerships for federal income tax purposes, as such, and unless you elect out under one of the limited exceptions, what you're doing falls under the purview of Subchapter K of the Internal Revenue Code.The 1065 deadline is March 16th.If you have the economies of scale, it may make a lot of sense to onboard a professional at this point. 

I'm relatively new to real estate investing and ready to scale up.

My typical turn around time for the entire process is 3-4 months.I truly believe this process would allow you to scale efficiently to your goal of 4-5 properties within your timeline.If you want to discuss further I am available.

My father is a real estate investor, he told me in some period the real estate loses around 40% of it is value, for many reasons, macroeconomics reason, less demand, more supply.etc He did not invest in other sectors like the manufacturing or food sector heavily. around 95% of his income generated by real estate.

If you are looking at them separately then a good CRM could handle large volumes of emails and there are a few texting platforms out there that scale as far as you'd like to go.