Make the call. It could solve everything if it turns out he is unsuitable to live with other dogs/children/--people who have wonderful country homes made for romping in-- Or he may already have found a home.
If you call, visit and he ticks every box ........well every animal I have ever owned has dropped into my life because of fate! some things are just meant to be!!
Two dogs are good (although DH has said no to a second one ). However, putting a sensible head on, have you worked out the extra costs Trin? Vets fees, worming, jabs, and food - probably more than Lolly eats!
Whilst you're doing all that faffing about with one dog, you may as well be doing it with two. You've got to go out walking, buy dog food, have doggy stuff for one. It's a waste if you don't do it for two!
I would love another dog, and I'm a sucker for looking through rescue pages 'for my MiL who is looking' but there are two things stopping me.
1 - I don't have any spare cash, and as much as I try to budget, I didn't budget for my dog having 3 extra trips to the vets on top of the standard jabs etc. We have insurance but even paying the excess each time smarts.
2 - We currently have plenty of people who will look after our dog if we can't take him on holiday/to a wedding etc. They are all dog owners themselves though, and they wouldn't be able to look after 2 more. We also take our dog away a lot in our camper. Can't imagine trying to do this with two though.
It sounds like you're sorted for 2, but 1 could be an issue. I would love to be in the 'go for it!' camp, but if the only thing holding you back is money, unfortunately that's one you need to listen to .