Write some Software Excel Google docs

I use excel and google docs. I need someone who knows both excel and google spreadsheets VERY well. I want to move some data from Excel to google docs but that is not the primary focus of this job. The primary job is an ongoing google spreadsheet/s design. I need to start with a spreadsheet that i can have all cost data input in a sheet for repairing houses. I will give the costs and need you to do the function and calculations. I need ongoing changes but I do NOT want to be charged for every little change. I am fair and do not expect free but the sheet/s will be a work in progress as I use it in the field and make changes. I think I need to have a template sheet that I then hit copy sheet and add the house address and save as a separate sheet. I think I need to be able to add photos to the sheet (maybe). I want the sheet to look user friendly ie if the house needs carpet I click a box beside carpet and the sheet brings in the amount I supply you with etc. I want to work with you on a long term basis not find someone new every month or so. This first bid is to build the cost categories with the text and amounts I will supply you. Probably 40 items like paint, carpet, toilets, cabinets, etc. Thanks Galen