If you enter by train you will be immediately approached by one of the many locals in an attempt to get you to rent a room from them. This may end up being a small not so well constructed but basically clean one room structure located in their garden. It may also not come with a shower with running water, instead consisting of a small outdoor cabinet with a tank located above it that your host will fill with hot water upon request. Additionally the local accommodation will most likely have a squat toilet. For those uncomfortable with using a squat toilet the facilities at the McDonald's near the train station make for a good substitute. Note that nobody speaks English or German even the most basic talk. This makes the negotiations very difficult! In July/August most budget hotels are fully booked. The total price for your garden residency will usually not exceed 10 USD and in the summer it is more than sufficient. The hostels in the city can be booked online or try your luck and just drop in.
Economy rooms have no windows, just 'artificial light'. Many clients book rooms for an hour or two in the late evening, so expect to see prostitutes entering around midnight and leaving soon after.
The high class mini hotel in Odessa on Deribasovskaya street. Fully furnished comfortable apartments with kitchen, bath tub, WiFi internet and daily maid service. Free airport pick up. Their low-end rooms are fairly expensive for what they offer. 55$ for a pseudo-clean room with no shower curtain, toilet paper, or wifi.