He has a ton of free content online (videos/podcasts).There are others out there such as Eddie speed out of Texas and Martin Saenz who is local (NOVA).

Any suggestions for where to go for a primer, either online or books? 

I looked into @Brandon Hall but it seemed that the options provided online were for investors who were more established.

the best way to do this is to have lawyer write it up. the second best way is to purchase on online (BP sells state specific leases, prepared by attorneys) and you can always make some modifications to it...but the most important part is to run the purchased lease by a local real estate attorney to make sure it and any additions comply with state law

He is a frequent contributor to this forum, and you can check out his company, Sense Financial, online.

3) Between Foxridge and Bushland communities which is a better bet in terms of ease of renting and better cash flow.These deductions are solely based on my research online.

Based on what I have found online it seems like deposits in the state of Oklahoma are typically deposited into an escrow account that may or may not be interest bearing. 

I'm not sure about the area since that's definitely not as safe as other areas in Houston.

All I do to show proof of funds when making a cash offer is take a screen shot or printout of my online bank account summary, making sure that it shows my name and that the total available balance is higher than my offer. 

That is the primary point..........what do you need in your mind to "feel" safe.