Except for the hassle of when they go out of business or break their lease :-)Let's discuss privately, I can help guide you as well as provide referrals. 

I was hoping to get some answers on some great RE resource websites as well as software you all use.I've done research on a few, just would like to hear some opinions from people using them daily.

To be honest, we mostly just relied on our long-standing affiliation with garage sales as our guide, since we had no idea about REI. 

Resourcefulness is the only problem here if (big if) this is a profitable property after paying someone to rehab.

Newer buyers the sellers like to know they have an experienced broker behind them that knows the process and can help guide them along the way.If you can say price range you are looking,state, STNL or MTNL, what loan to value, and what cap rate you are expecting then I can give you an idea if you are realistic or stop looking before you start. i review about a thousand of these a week for clients nationally so tend to know state by state what cap rates are at for what price range for NNN - STNL and MTNL.There are a few books out there on the subject.

I also wrote these three posts on how to find off-market leads, you might find a few nuggets in there:https://www.biggerpockets.com/blogs/8814/72016-55-resources-to-find-real-estate-deals-onlinehttps://www.biggerpockets.com/blogs/8814/71506-27-ways-to-find-off-market-and-wholesale-real-estate-deals-offlinehttps://www.biggerpockets.com/blogs/8814/72664-35-relationships-to-help-you-find-more-houses-to-flip-or-wholesale

You're acting as a realtor or fsboing.Many states have taken an overreact posture on this while not having the resources to actually deal with it - all bark and no bite- which is unfortunate.  

Apologies for not being able to guide you on answers to your questions as I'm not experienced in the DFW Market.

Are there sites or resources that we can use?  

There are turn key resources that mention intro’s to preferred lenders who will mortgage?