it's gonna cost you 500 -1000 bucks(if you do the work yourself). you might as well get a good clutch, and if you've got the cash, take the tranny to a shop and have them look it over and replace anything worn out. that way you know its 100%
I've seen swaps take 4 hours, i've seen them take three days. just make sure you have everything before you start. double check it 5 times and make sure you have it all. you don't want the car in pieces and then not have a pilot bushing or something dumb like that.
its better to take your time then it is to rush so plan for an entire day...
good luck