A developer typically will not buy a piece of land without getting site plan approvals, zoning, LOI's from tenants,etc.

I want to start prospecting probate leads, I’ve been on the website but what document can I find the subject property in?

Most counties will have information about their tax sales on their website. 

If you're parents are going go receive any money from that then they will have to take depreciation then on that property and it will appear on their schedule E as well (upon sale they have to recapture any depreciation they took or could have taken so watch out for that).If you go further the route @Corby Goade suggests with a deeding you'll want your accountant to advise on gift tax consequences or use of the one time limitation. 

However, as Texas is a Community Property State, it's probable Husband already has a 50% interest in  the property, regardless of whether or not his name appears on the deed.  

Driving for dollars or purchasing lists and your target audience. websites and such will come later.3) decide on what type of direct mail.

The properties themselves are producing nothing it is your equity that is buying the income at a very high cost.None of your properties appear to be cash flow positive (based on the value of your equity) so I would sell them all and reinvest in better properties or put the money into a income fund.

You can find them via BP and meetup sites.

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There are other options like websites they can send payments to.