Debt to income ratio on unsecured line of credit?

[Steve S.]

I've talked to several local banks and they all seem to be around 40%. 

For round numbers, can if I make $100,000 / year, what would I expect them to be comfortable with as far as extending me an unsecured line of credit?

Typically the loan is prime +1%   as an example, today if you had a $100,000 line of credit and spent it all, you'd pay about $363 / month in an interest only loan  

They typically expect to to pay it down in a large payment after closing a transaction