Some years ago, Dometic sponsored a fairly technical review of their SmartStart, which is sophisticated, but rather expensive- in the several hundred dollar range and compared it to a cheap Supco capacitor, which costs less than $20.
The Supco capacitor cut starting current about 25%. The Dometic kit reduced it about 50%. I am almost positive that that the Dometic kit will let a Honda 2000 start most A/Cs. But I would try the Supco capacitor first. It might work.
David