I am a sub-sub contractor on a public project for the City of Tampa. The subcontractor that hired us is not paying our invoices, and we have filed a lien (for the moneys owed as per the contract). We have 15 days to file a notice of non-payment and intend to file a claim against the bond and foreclose on the lien against the property. When do we add attorney's fees, lien filing fees, administration costs, and other additional expenses incurred by the prime contractor's unwillingness to pay? I want to make sure we do not lose our right to those monies owed. We have been forced to use our credit line and at over $100K borrowed, the interest is over $1500 a month for five months now. I am located in Texas, but the property is in Tampa, FL.