I've created more than 25 projects with XAF in the last 7 years. I make my living out of XAF.
Your project is on VB, but that's not a big problem, everyone has their preferences. I can resolve your issues, but also teach you new things and how to resolve them. So you can try by yourself in the future and ask for my help on new things.
Also, you're using 18.2.6 and we're so close to 19.1. You may be missing some special features that can make your income bigger. We can talk about that too. I can deliver everything you asked for in the project details, I've reviewed your code already. I've some doubts about the fine details, but I think we would understand each other in no time.
For the same price I can help you with: use of lookups for your classes (with metadata and partial classes), controllers, hierarchy, custom XAF attributes (display name, xafdefaultproperty and more), your actions coding, updater and also dashboards (that add much more value to the product for just one or two hours of your time).
I should charge 350 for all this, but since is my first bid and your budget is limited to 250 that will be the final price.
This will require at least 3 or 4 one hour remote sessions until is done, using AnyDesk, TW or Skype.
Thank you and best regards.