Be careful with the TM Warthog, I've had mine for three months and haven't been able to get it to work. Every time I run the TARGET software it crashes. Just saying, YMMV.
This is surprising. I have never had an issue with mine. Installed it at the start, but never really use it much. I just use it to turn the LEDs off on the throttle when they decide to turn on if I disconnect mains power from my PC.
Have you tried downloading the latest TARGET from the website? There must be something not agreeing somewhere.
I used a Logitech Extreme 3D Pro for years (actually two of them) and always thought about a TM HOTAS Warthog, but could never justify the large initial outlay. Then I saw one pretty cheap (relatively) at Flightsim Store (Australia), and it was selling for $490 AUD compared to the usual price of over $600 AUD. After a bit of thought, I bought it. Mine had an initial dust gathering period, as I was first hesitant to pull my desk out and tackle the rats nest of cables to set it up, and secondly I overlooked the fact I needed rudder pedals with it, so had to order and wait for those. I spent another $200 AUD on a good set of Saitek Pro Flight Combat rudder pedals.
When I eventually set it up and began using it, I was instantly amazed. I actually pulled out (or at least installed) another metaphorical dust gatherer, the DCS World A-10C "WARTHOG" module, and using this product with the Warthog controller was just a moment of enlightenment.
I use my Warthog controller every day and I use it for heaps of aircraft from the A-10 and other twin jets in DCS World, to airliners and Cessnas, with one or two engines in FSX and P3D. In FSX and P3D, I just use one throttle lever for throttle, which leaves the other one spare for a prop lever, and there is also another axis that can be assigned to mixture. I have never had an issue with mine (touch wood), and it looks and works the same as it 1.5 years ago (Hmmm. I thought I'd had it longer). I have not regretted the purchase of the Warthog or the rudder pedals for one second.
In saying that, if it is too much to spend, there are more similar alternatives these days. Thrustmaster themselves have produced a few HOTAS controllers that don't cost as much. It is also possible to purchase just the HOTAS Warthog throttle these days, so that could also be an option.
Good luck with it.