They used lasers to find the low spots and used "push piers" to lift those areas. 

But I do not find that much information pertaining to the process in doing so.

Here’s why Oklahoma might be a great market for you:Affordability: Properties in OKC and Tulsa are often under $200K and offer strong rent-to-price ratios.Landlord-Friendly: Simple tenant laws make managing rentals easier.Growing Economy: Job growth in energy, tech, and aerospace fuels rental demand.How to Evaluate Deals:Run the Numbers: Ensure positive cash flow, check cap rates (6–10%), and use tools like the BiggerPockets calculators.Find Deals: Network with local wholesalers or agents, and look for value-add opportunities in stable neighborhoods like Edmond (OKC) or Broken Arrow (Tulsa).Let me know if you’d like tips on analyzing properties or finding deals!

You can usually find some events by doing a simple google search.

This tool (no affiliation with BiggerPockets) can help your son find properties with assumable loans. 

Either can work, propstream will be more affordable  but is propstream as good as data tree finding vacant land. i am on propstream looking and cannot seem to find anything decent , and i am looking in areas where i know vacant land is

I’m new to the space but eager to learn from experienced professionals, expand my network, and find opportunities to collaborate. 

If you can't find what you're looking for, try the Bigger Pockets Fileplace.

How did you find this deal and how did you negotiate it?

the little nuances one learns in the foreclosure bizz... states with redemption rights are very tricky... in Oregon the rights sunset after 6 months.. so many investors if they don't have the rights ( ie can't find the person who lost the house) Or does not want to pay someone who bought the redemption rights and is holding them hostage.. they just wait out the 6 months and go about their bizz...