You guys are doing your credit all wrong. Banks like to do business with businessmen. That means you go to a bank with some documents that have at least been signed by a CPA. You need to have an income statement (profit & loss statement), and a balance sheet, and your last three tax returns.
Go into several banks, inquire about their service charges, their loan policies, and make noises that sound like they need to impress you, not the other way around. Tell them you want a bank that will give you an open line of credit. Explain that sometimes you get big projects, and it would help your payroll and materials purchases. Be sure that you have a very realistic limit on what you might wish to borrow, and make SURE that you don't let them think you are just planning on buying a stump grinder that no one will finance.
If you go in with the right documents before they ask for them, they will take you very seriously. If you are prepared to show them a business plan, you might just get a bidding war between the banks for a better interest rate.
Once you get an open line of credit, use it! Never let it get out of control, and make sure that every year you bring it down to a zero balance. With an open line of credit, financing longer term things like stump grinders, bucket trucks, or whatever...just comes real easy.
Say you go to an auction & spend 22k on a neat truck. Your line of credit is only 20k, but you have 4 grand in the bank, and payroll is coming up. Write the check, call the bank and tell them to deposit 20 grand. Then drive the truck to the bank, and ask them to write up a 3 year loan for the truck. They have already loaned you the money! They will be happy to get guaranteed interest income on a secured note, and that liberates your line of credit to manage payroll or other cash flow problems.
THEN...rather than leaving a big stash of money in your bank account, pay down any line of credit. With a line of credit, you don't need to save money for your desperate cash expenses, and you can pay off the charge cards and other trade accounts when the bill comes in. Then your credit gets better with them, too.
I did that way back in 1984, and I have never been turned down for a loan since then.