If you are a relatively new investor, and assuming you are 1 of the 8 inheritors, it would be better in my opinion to sell the house, and take your $80k - $100k as a seed fund to invest in single family and small multi-family deals.

Why not seed the lawn in?

I would remove all the broken pieces of concrete or block, and depending on condition of existing concrete pad, leave the concrete and seed or sod the rest with grass.

Plant the seeds baby!!!

Therefore another alternative for investment is corporate venture capital and using real estate projections to get seed capital.

It sounds like you found a bad seed, but in general, Realtors are a great tool and resource to guide you through this process. 

Looking for Seed Capital tips!

Real Estate related or not I'm open to ideas to make this seed grow.

your goals while commendable are not realistic the only way you do what your describing  10 million etc. is to become an operator.. and big time one at that.. real estate is a LOOOOONG game  not sure what or who put it in your mind that you could go from zero or basically a few hundred grand in seed capital to 10mil of free and clear props in 10 years.you may want to rethink your goals and get just a tad more realistic..

We did a VC seed type of project a while ago and were able to go about it that way.