The House could hold them in civil contempt and hold them in one of the pocket offices in the House Office building since t h st no longer have a jail sell. Remove all the furniture except a bed with a prison mattress, table, chair shelf, small TV and what ever minimum requirements there are for a jail cell. In an outer office they could put some exercise equipment. They theoretically could hold them until January and as soon as the next House session hold them for another 2 years. Since this would be an action by the House they could argue that their action is not subject to judicial review under separation of powers and refuse to release him until all appeals are completed. If Holder sends the FUN to spring him, block them with their own bodies.
IIRC, in the past they weren’t always held physically within the Capital building. Some where held in jails in the District. Of course back then Congress ran the district. With home rule (i.e. far out leftists) in charge of DC now that wouldn’t be suitable place to hold them. Of the top of my head I see reason, other than convenience, for picking one holding cell over another. So I suggest sending off to Sheriff Joe for safekeeping. Even with the distance I bet he’d be low bid. And I’m confident he’d be willing to House Holder in his jail. They could teleconference any legal hearings from DC.