Considering that a new 45u 2 post rack is in the $170 range, that is not the expensive part. The real cost will be the labor. And to do this properly you'll need to plan this out in detail to minimize outage problems. Tough to see from one picture but it probably would run into 4-5 hours of prep with cable labeling, etc, then at least a couple of overnights to get the heavy lifting done, more if there is a lot of cable management. If you have to And don't assume that all base plate holes are laid out the same. And you definitely want a ladder rack at the top for stability as well as cable management. And they should have some more AC outlets as well. But, all in all, looks pretty typical in what I see in hotel MDF's.
In reality it's very doubtful that their are willing to spend that kind money. Been to many hotels and if it's not a $200 solution they are not interested unless it solves real problems. And kludging together some "solution" will come back at you with even the slightest problem.