Where to find money when your project takes longer then expected?

[John Quiles]

I'm doing 6 big projects at the same time right now.  2 of them are complete and for sale, the rest are being remodeled.  The 2 that are for sale took longer than expected plus one of them went over budget by $30k.  That means there is no money left for holding costs and I know it will probably take at least 2 more payments before closing on them.  That is creating a cashflow problem.  What should I do?  Should I find another investor or ask for more money to my original investor?  What do you guys think?