How big a garden do you need to justify a sit-on lawnmower?

[srebbe64]

The lawnmower packed up this week (so the wife tells me) and I took it to a local garden center to be fixed. However, got chatting the bloke who said I could part exchange for a new or refurbed one. Saw this little 'sit on' mower and fancied buying it. However, our back garden is not small but it's also not that big (circa 150ft X 150ft). Anyway, wifie says it's not big enough to justify a sit-on mower but the petrolhead in me wants to get one! Also, I would actually mow the lawn rather than the missus so that would be a benefit!

[srebbe64]

HiRich said:

Have you got space for a drive-in shed/garage for the lawnmower and a trailer/attachment?
If you have, the garden's big enough.

Yeah got a big shed and garage. Hmm, sorely tempted now!