Does your ceiling height have enough space to accommodate this?

Also, did they add additional capacity to the HVAC to accommodate the extra square footage?

My advice is always ask what they want and try to accommodate their needs.  

But if you find the perfect property you want to end an exchange first your intermediary can set up a holding entity (the exchange accommodating title holder or EAT) which takes title to that property and parks it until you sell your old property.  

Units That Are Exempt From the Rent Adjustment Law Section 8 units and other units that have rents that are controlled, regulated, or subsidized by a governmental unit, agency, or authority.Accommodations in motels, hotels, inns, tourist houses, rooming houses, and boarding houses, provided that such accommodations are not occupied by the same tenant for thirty (30) or more consecutive days.Housing accommodations in any hospital, convent, monastery, extended care facility, convalescent home, nonprofit home for the aged, or dormitory owned and operated by an educational institution.Dwelling units in a nonprofit cooperative, owned, occupied, and controlled by a majority of the residents.Dwelling units which were newly constructed and received a certificate of occupancy on or after January 1, 1983.Buildings that were substantially rehabilitated after January 1, 1983.

I did get a text back saying OK.My issue is they want me to accommodate them by making appointments after 5 when they get of work... which most vendors charge extra because it falls under after hours, my in house handymans work from 9-5 every day except weekends. 

You can buy an office building with enough space to accommodate your company.

They're going to either accept the lower of its appraised value or the purchase price.Yes, there are some hard money lenders that will accommodate longer-term investments, but the down payment required is going to be around 40%.

I've been trying to buy SFH homes in these areas for anywhere between 90 - 100 per/sqft and renovating them for a total of 140 per/sqft when finished. 400 - 500 sq ft units in my HUMBLE opinion are EXTREMELY small and are much harder to fill with longer term tenants than say 700 - 1000 sq ft units which can accommodate working couples and families.  

My question is: even though it doesn't really make a big difference to me whether I receive the rent on the 1st or the 15th (as long as I actually get it), would you recommend for or against changing the lease agreement to accommodate a tenant in this situation?