First you already have 2 complexes. So if they are all similar you should know how long it takes to do each property. Second, never bid competitive. Another company may have less overhead. You might make 20% profit charging $200/hr while I might make 20% charging 150/hr. Figure your cost and time on the ones you already do and then figure out the numbers on the others. Should be real easy. ****RED FLAG****** You said the bid changed hands 3 times in 4 years!!! They are looking lowballers or companies are bidding "competitive" and it turns out to be a money loser! Know your cost. Know what it takes YOU per hour to run and then do the math. Don't worry about others.