98 Blazer Replacement

I have 1998 S10 Blazer and the tranny is toast. I need to either have it rebuilt or put in a rebuilt one. I know it would be not be a walk in the park but is replacing a tranny something a "backyard mechanic" could do in his garage? I am fairly mechanical, I do 90% of the work on my cars myself I have just never replaced a tranny before. Everyone I have spoken with wants about $2000 to rebuild the tranny and that's a little steep for me right now. So I am thinking of picking up a rebuilt one and doing it myself. I have done some searching online and it looks like I can pick up a rebuilt for a fairly reasonable price. What are your thoughts? Thanks for your input, I appreciate it.