(i looked at the previous owner lease no mention of pest control)The previous landlord changed the A/C filters for every unitThe previous landlord provided light bulbs.Is that common in Texas? 

That's all.Remember, all the "advices" in the world are generalized and/or for a specific purpose and goal. 

While I work towards becoming a professional engineer and working with developers, my goal is to own a couple multi-unit properties by the time I’m 30.

I think your first order of priority is to set your goals, both in terms of life in general and Financial in particular.

If my goal is to refinance the property once it is rented and rehabbed, but I cant get a bank loan to pay off the hard money lender, what do people normally do?

It doesn’t do it automatically but it’s a very common thing.

I'd suggest you weed out the ones that don't fit your end goal and schedule.Rentals and Air bnb seem to be the most common routes for investors in your situation.

The goal here is to get the best partner for your home purchase.

I'm always up for people learning more and gaining knowledge.So really depends on what your goals are.   

As you explore different paths, stay focused on your goals and be proactive in seeking opportunities.