So far I've checked with one and they don't offer an FHA Loan and for conventional you need 25% down for a triplex whether it is primary residence or not (unless you go Home Possible but I don't qualify because they have income limits).

Also, I have my own capital that I could use in a conventional mortgage that would secure long-term financing, but doing that would probably limit the number of loans I can take out.If they’re giving me this real estate loan in part because of the I have as collateral, does that mean that I can’t use that capital for other things?

You are bumping into the standard conforming residential loan lower limit. 

Since we live in Texas and due to the moratorium in place and no evictions I was limited about options and I sense he took advantage of that .

You can also have a limited CoCR, but from year 2 forward, the deal from a cash return perspective really smokes.CoCR is very important because it tells you how fast you can move forward, but it isn't the end all in any deal analysis.

In my limited time knowing them, they appear to be good tenants that wouldn't give me problems.

But it illustrates the point that even at very compressed rates, as long as the property "pays for itself," it can still be very attractive to many investors.Here's the fun thing though: this graph is an industry generalization based on limited data and survey responses. 

Then that money is completely off limits and my only option would be to do a cash out refinance, correct?

Also in search for a Mentor not limited to any of the three places mentioned previously.

Since this if above the $500k limit wouldn't I be able to use the whole $500k exclusion?