If you can find a good deal in Harker Heights, those properties typically rent the fastest. 

No matter where you choose to invest, please keep in mind the following (copy & paste):--------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a Class A property in Class D area, what quality of tenant will you get?

Just crunch the numbers and ensure the terms work for your deal.Hard money typically funds up to 90% of the purchase price and 100% of the rehab costs on a draw schedule.

That will typically spook them into catching up or chase them out.I recommend you read some books (see my signature?)

We ended up putting that on the backburner and using the typical Airbnb, Furnished Finder, Zillow, etc. routes to fill our units.

Given appreciation is typically where you are making most of your return in any real estate, having this additional appreciation helps create much higher returns.Additionally, my single family tenants, typically stay a couple years longer than my duplex tenants.  

@Lisa Eisenhauer thank you for your detailed response Lisa.my hesitancy with titan is that they are a nigerian bank. and my hesitancy with solera is that the are pretty new small bank. given how small banks that have failed in the past, i feel more comfortable with going with someone like chase. here is list from fdic of recent failures: https://www.fdic.gov/resources/resolutions/bank-failures/fai...however, since i ran into problems with chase based on what i described in this post:https://www.biggerpockets.com/forums/51/topics/1150830-bank-...i wanted to know  who i can go with. so i called solera, firstly the person who picked up transferred me to an IRA LLC bank specialist. when my call go transferred, the specialist was i guess working from home and had a crying baby i could hear. that was my first uncomfortable momemt. i don't accept that from a bank. maybe a small retail company or something.secondly, i asked her if you know how an ira llc bank account is set up and i want to make sure it's set up correctly so i have some questions i'd like to understand your process. she right away asked me who is my document provider. and i was like, what is a document provider. she asked who set up your llc and i told her i did that. she said well we usually work with document provider because it's not a typical llc and is set up differently.i assured that the my llc is not an issue, i do  have that set up properly. it is manager managed. i am the manager. my ira is the 100% owner/member of it. then she assumed that my ira is with solera. and i told no, i have it at another custodian, all i want to do at solera is to set up a bank account. and what i want to know is when you open an account at your end, in the bank account who do you put as the owner of llc. she told me well it's a business account that llc owns. and you will be the manager on the account.and i told her, yes, i already know that and that's how it is currently set up at chase. the issue i am asking about is who will be listed as the owner of the llc at your end on the bank acct.. it should be "xyz custodian fbo shaz...IRA" and it should NOT be me. she goes. llc will be the bank owner.i think i had to repeat 3 times that i am  not asking whether or not bank accout will be under llc. i am asking in filling out your paperwork for opening the bank account, does it anywhere ask who is the owner of the llc and if so, who will you put. she goes, oh we dont' mention that anywhere but if you did have your ira with us then we will have "solera bank ..custodian fbo shaz...IRA". 

And then add in the typical appreciation of say 3 to 5% (of 500k).

No, lenders typically don’t require that.

If you're planning to use an FHA loan or another owner-occupant loan, there are typically rules about tenant occupancy.