To build front wall with steps on empty lot in Kansas City, MO

I have a newly acquired lot on Flora Avenue, Kansas City, MO that needs a front roadside wall with steps to be built pending new development.

As I live in the UK all work will have to be awarded on a trust basis, and will pay 50% upon assignation of the job. I will require full before and after photos of work carried out at which point I will pay the rest of the money once job is confirmed to be completed.

I have set a budget to be no more than about $125

I hope you can help me!

Note: On the map shown only approximate location.