I hate outside door hotels too - though once I ended up in a Marriott Residence Inn that had outside entrances. Thankfully it was set up in an apartment style, so I had no issues, but it was advertised as a regular hotel + lobby so I did feel a little taken.
However, there may be valid reasons for going the cheaper route. Here's an excerpt I copied (copy/paste, word for word) off of an escorts FAQ page:
This is no offense to the provider in question, but that entire FAQ sounds like excuses. Not using a credit card? You can use Paypal with your bank account on Hotwire while spending 45-60 for a 3 star room. That eliminates two problems right there along with "needing to share it" to cover the cost.
f. you are probably less likely to run into someone you know at the motel6 than the Hilton Garden Inn...seriously
Did she not stop to think someone could see from a location across the street, or see the clients car? Then he has to explain why he's at a Motel 6 which is a LOT harder than explaining why you're at the Hilton.