Purchase agreements will vary from state, given that each state has its own laws relative to certain issues in real estate transactions.

Your question is tough to answer because lease option terms vary considerably.

My self and my business partner have business degrees and the construction skills.

this can vary considerably depending on the market and who is doing the work,.

Details of rates and terms vary quite a bit. 

Unfortunately the legal status of these varies from state to state. 

They will probable average the income over the two years.If you haven't been in an industry for 2 years they won't let you claim income from any job/industry (I believe the exception is if you just graduated from college and are in the industry your degree is in)

I would like to get nearer to 5% down if possible, and am trying to structure an offer that she may consider.What I would like to know, is if anyone would be willing to share an idea with me for how I might be able do this.And the second question: Is it unheard of to structure a purchase so that the buyer pays the seller a base amount per-month, with a varying extra amount dependent upon the number of occupied units?

I know it will vary from state to state.

Our market is very micro and can vary greatly street by street.