Looking to invest in a few properties over the next 5-10 years and want to get a sense for tenants, common issues, etc.

It is common for PMs to stick fees into paragraphs throughout the agreement, this is another red flag.

Does anyone know of a site or common place to meet investors and rehabbers to make a deal with.

I am clueless when it comes to the economic development board, but I do know that Waco in general is extremely business friendly and has very little regulations compared to other Texas cities.

When I approve a customer for an investment home its extremely hard to find a good agent that will "listen" to the buyer and me as the banker.

You will likely have common area lighting (interior and exterior), perhaps heating and cooling too. 

Their windows are extremely affordable but the company lacks reviews.

Well said Jordan, it's not as common in this market to have an ADU but there are some out there.

However, these are the ones most commonly used:Five-of-Ten-Year Test: You must have materially participated in the activity for any five of the past ten years.500-Hour Test: You must have materially participated in the activity or activities for 500 hours in the current tax year.Step 3: Calculation your participation hoursEnsure you are tracking your participation hours.

You asked about buying older properties and the biggest issues I have found is that roofs need to be replaced, HVAC needs servicing/replaced, and sometimes there are foundational issues (not super common).