For all banging away at giving free answers, here is one with potential $ (though I'll give credit on the question to anyone who provides credible suggestions):
I've been tasked with researching the possibility of replacing our DOS program that does GL, AP, and AR/Property management for commercial real estate. A non-Filemaker equivalent would by Yardi or IBS. It's complicated because billing would have to stream down from Building to Tenants, each Tenant has a different base, %, terms, start year, etc. Do you know anyone with experience at this and even better who has pre-written package? They would do the sell and installation and I would do the upkeep. Thank you.