There are a number of ways it could possibly save money. There could be a retiree who goes to their holiday home in Spain every July and, rather than leave their house empty, lets the club use it at a reduced rate. Somebody who rents property could be between tenants, and want somebody in their flat short term. Someone with a four bedroom house whose kids have now left has room for a lodger and happy to help club at a reduced rate. There are many more possibilities.
The club survives on volunteers. Whether that be office staff or programme sellers, people give up their time for Partick Thistle for nothing. There is a guy that works with the maintenance team, pretty much full time, who is retired. He could get a job in Asda or B&Q, but he chooses to work at the club - and doesn't get paid. Every summer the club ask for volunteers to help get stadium ready for new season, and people go in and help. Painting stairs, changing light bulbs, whatever.
I don't think them asking for help for accommodation is much different, if different at all.