Namibia isn't that cheap
Although the value of the Namibian Dollar (linked to the South African Rand) has fallen in recent years, visiting Namibia is not as inexpensive as you might think. Namibia can be an inexpensive travel destination in some cases. Basic necessities such as food and drink were inexpensive, as was living in cities and towns. Many national parks also have easy access to their entrances. However, as you travel deeper into Namibia's desert, prices skyrocket. You are advised to visit thrifty cities and use temporary housing services.
Alternatively, stay at many campsites if you have camping equipment. If you plan to drive on your own, be warned that gasoline prices are expensive. If you're traveling as a family of three or four people, the price person often goes down because kid's tickets are cheaper and hotel rooms can be shared. If you travel slower over a longer period of time then your daily budget will also go down. Two people traveling together for one month in Namibia can often have a lower daily budget per person than one person traveling alone for one week.