That's a loaded question as it depends on how mechanically inclined you are, what kind of tools you have, how many other timing jobs you've done, etc...
Generally speaking, if you're able to either get the crank pulley bolt loose yourself or have it loosened before hand and you are methodical and detail oriented, you can do it in a full day if you've never done a TB job before. By this, I'm talking about idler, tensioner, water pump, timing belt, serpentine belt, and coolant replacement. You may want to set aside two days where you don't need the car in case you take your time or wanna take a break or split it up into two working sessions.
I would say it's more labor intensive than actually being difficult.
The only difficult part for a beginner would be to make sure the timing marks are correctly aligned and the new TB is correctly aligned and tensioned to the gears when installing. Depending on your technique, the installation or reinstallation of the serpentine belt could be tricky with one person.
Indeed... I also believe is more time consuming than hard to do.. But
After doing several timing belt jobs on different Hondas and Acuras there is also difficult involved because of available space. If you have small hands this isn't a Problem but with Average sized Hands or Bigger this is a Problem.
From Easy to DIY to Very Hard because of Space:
1.- Accord 4cyl
3.- Accord V6
That's all the cars I did a Timing Belt Job.. TL is still on the Very Hard because my Hands could barely fit between the shock tower and the engine.
i all ready have the crank bolt loosened it didnt stand a chance with my 3/4 in drive impact gun i guess my other concern was the amount of space to work in
thats a really good video looks like a straight forward pretty simple job
Just make sure you are at TDC and do not move any of the gears once it's at TDC and the TB is off. I've seen quite a few amatuer mistakes done by people not paying attention and had it a tooth off during reinstallation.