You are facing a difficult decision, but firstly a big welcome to BW! Would it be possibe to get someone to let them out midway durng the day?. Do you have a fenced off back yard? 2 Rescues could have a lovely home with you if you can organise things so they get out for a pee. If not special pads etc. However, it would be great if you could take some vacation to settle them in. 2 beagles would be great if they already know one another, our two came together-otherwise start with one and get another later. They do get used to a routine. 10 hours would be the limit, thus if you could organise someone to call past, it would be perfect. Good luck.