The load leveler that AZ sells is a piece of crap. However, it DOES serve as a nice, solid, metal cross-beam to actually span the engine, and has down-chains & brackets so you can bolt the engine to it. Or, use a chain.
I've done both ways - the chain & the leveler. it was quicker & easier with the leveler as a spanner than it was with the chain. However, don't expect their leveler to help you out "leveling" once you pop the tranny off. You can have one or the other - level after removing the tranny or level before removing the tranny, but not both. At least not with the AZ leveler.
strictly financial: Assuming it takes 2 business days to pull, do the work, and reinstall, a picker is going to be $80, and the stand is going to be $30. There's $110 toward the cause. Go longer than that, and it's $15 per day for the stand. Assume for a minute you slip & do this 4 days, bringing the picker back & re-renting it for the reinstall. That's $140. At 4 days, buy a stand for $50 & you have it whenever you need it. It might be far more cost effective to buy the stand, and rent the picker. It'll cost you $300 for everything listed - stand, leveler, and picker, on a straight purchase, but you'll always have it when you want it. Question is, will you ever need the picker again, and can you live with when the rental place is open?
Good luck.