It's unlikely things will get tighter.
If you look at the match ticket prices and season ticket prices you will see, well they should have, a dramatic increase. SI had the average attendance figures at 35,000 every week despite in-game the Club selling 41,000 season tickets. In actual fact, we have the highest avg. attendance in Scotland this season and, in the game, the poor avg. attendance limits money available.
After the takeover with around £20m in the bank just from ST sales every year + European football when you get back to the top the transfer budgets should start increasing year on year... plus the typical stadium expansion to 63,000 you can expect big transfer budgets at some stage.