Base station- how much coax is too much?

I am finally getting ready to put up my tower and get a base antenna up in the air. I have chosen LMR-400 as my coax of choice, based on performance and cost factors.

I can put the Rohn 25G tower next to my house, using the standard concrete installation and a roof support bracket, but I really don't want to bolt anything to my house.

I have a Rohn self supported tower also, and the spot where I'd like to place it in my backyard would require a good 200' of coax (50' coming down the tower...

Base station- how much coax is too much?