The alternator will cost you the proverbial arm leg first male born.

As for the eternal question, when new that mower cost more than some small cars.
An excellent mower.
Honda abandoned the ride on market because they just did not understand how price sensitive the mower market was so they were always doubel the price of all the others.
If you just want a cheap ride on, go for it as it has a mechanical PTO so ony needs the alternator to recharge the battery.
The alternator will be about 2/3 the local price ( including shipping ) from the USA but finding discount Honda dealers is a bit of a PIA.
Honda motors of course were used in every thing and genuine Honda parts will be available.