The last tower I hired was 85 quid for a week. Same height as what you want. If you can't do that job in a week you shouldn't attempt it at all.
We live in UK Joe,
From time to time it rains quite a bit.
So- until you know anyone who puts a hold on rental rates if it rains . !!!!!!!!!!!!!!!!!
Like I say though- you pays yer money you takes your chance .
Always amazes me why a 'established' builder does not have essential equipment of his own .
Like I said- I NEVER hire anything.
But- I do have builder pals who always want to borrow my stuff every week. They are mickymouse builders - always skint and always will be.
Rather pass their money over a bar than spend it on the tools of their trade .