In my local MLS, they would be listed in the 2-5 unit category. 

We've invested around $50,000 in improvements (central air and hardscaping) and our mortgage is a 30-year fixed at 2.5%, with a PITI of $2400.We think it could rent for $3,750 - $4,000 per month based on local comps.

My local area has high property tax and makes me wonder about PA as an alternative. 

Sometimes cities will allow this, but it depends on local zoning rules.If neither option works, it might be worth consulting a real estate attorney to explore your options.

You might want to look up the pool requirements for Phoenix and Scottsdale AZ if you want to be the safest you can be, despite the lax laws in other localities. 

Has anyone found a local Sac CPA they can recommend?

Certainly one account for each LLC, (separate for security deposits based on your local rules)

Any groups/meetups that i could attend in the local Houston area?

I'm a local realtor and investor, so I’d love to help you find the right property and navigate the market.

I am new to real estate investing and looking to connect with any local investor.