The Caley boss has signed eight players since the end of last season, which ended with the club sixth in the SPL table and just short of what would have been a place in Europe for the first time.
Spanish keeper Antonio Reguero made 24 appearances for Caley last term but, following the end of his one-year deal, Butcher is looking to bring in another keeper alongside the experienced Ryan Esson.
"The chairman Kenny Cameron gave me my budget towards the end of last season but that is pretty much all spent," said Butcher.
"I'd think once we get a keeper in that will be our last signing although you never know.
"The difference from last season is the players coming here are our own.
"I'm certainly not ruling out loaning in players. It is an avenue we would look at but maybe more towards the end of the transfer window."
Butcher has signed Curtis Allen, Ben Greenhalgh, Harry Hooman, Marley Watkins, James Vincent, Adam Evans, Danny Williams and Joe Gorman since the end of the 2012-13 season.