I am not an independant instructor, but I do run Moodle independantly from my University's chosen product (Blackboard). I use Moodle to delivery my 12 courses/year to my students. I am not sure how many courses you envision teaching.
I started by installing Moodle on a hosted server. The install was a "one-button" approach. Then, I started reading about Moodle's configuration and made some minor adjustments to this install. It worked well for me for 4 1/2 years.
Last December, I switched to a virtual dedicated server, which took more knowledge about UNIX, PHP, and mySQL. I am not a computer administrator, but I was successful reading about running Moodle in this manner and getting my Moodle up and running. I have delivered 6 courses using this virtual dedicated server approach.
So, I guess that I wear one of those "admin" hats, even though I don't consider myself an admin.
The first approach (hosted server) should cost you less than $10US per month. The second approach (virtual) should cost you less than $40 per month. These prices include a domain name and plenty of space for your content. Moodle, of course, is free.
By the way, if you attempt to run Moodle on your own, you will find a lot of information from books, the Internet, and other Moodle users. However, you have to enjoy searching for this information and be willing to learn. Sometimes, I wish that I could just ask a Moodle Administrator a question, but I don't have one. But there is great information everywhere.
Hope this helps.