Not all HI places kick you out during the day. Some do. E.g., Back in '99 the hotels at Lake Itasca and Bar Harbor were closed during the day. Seattle was not.
They are reasonably, and in some cases, very low priced for the market. One in Philly is only $22/night. Try getting a hotel room for anywhere close to that.
https://philahostel.org/policy-overview/