There may come a time when rooms in Gowanus are available for $29.99 a night because the entire Manhattan market has crashed, but for now, the hotels that will be charging those prices are moving along. We’ve already written of the Super8 that will be nearing completion on Third Avenue, but there is also activity on Hotel Row on President Street where demolition is now complete on a future hotel. A developer named SAI Hospitality plans to build a 100-plus-room hotel on the site pictured above; SAI also has designs on another vacant warehouse on the street, between 3rd and 4th avenues, where it says it’s going to put up a second hotel. DOB rejected SAI’s initial application for a new building permit in the spot where demo’s under way, but the application shows a five-story, 117-room property is on the drawing board. Also, work continues on the future Fairfield Inn (which has an almost meaningless partial stop work order that has not interfered with work and that happens to sit atop the site of a bubbling mass of deep underground toxins left by the local Manufactured Gas Plant, but hey, it’s way down there underground, so why worry?) Many of these hotels have been well-chronicled by our former correspondent Max Casey. Oh, Gowanus Hotel District, you do bring us great pleasure.