Dam, this is not the solution either. But if it would be like on TL, the prices would be very variable, depended on time when you put that player on loan. You know that were and is the problem to have fair prices on TL, imagine the problems with loaning players.
I think that loaning would come on waves, because mostly would put the players there a teams, which would be kicked off from the national cup or B3, because they would not need so many players for the rest of the season...
So the solution would be possibly that if you put a player on loan market, he will occur there on random time in the next 3 days or so.. So you can chat with that guy, but he will not know when the player would be there. Also there should be the condition that team cannot have more than 1 loaned player in the team (so cannot boost his team easily only by everyday waiting on loan market) and can put to the loan market as many players as he want (because I dont see there any complication)