impossible for anyone except them to say how long it'll take, ask for an time estimate, depends on their skill level, experience with real restoration work, and motivation to get it out the door - at $45 you're getting a deal, some shops will use our resto-jobs as 'fillers' when they need a break from more lucrative insurance jobs or don't have enough of those to keep busy, and charge less per hour but takes weeks or even months to finish up
a floor pan can take quite awhile as that's where the cab supports are and they may have to do some non-trivial fabrication there - complete step replacement also takes some fabrication, front and back .... could be 500, but don't be surprised if it's over a thousand
Bill