The drill is garbage. Uneco. Only advantage is "10% mining skill gain", terrible. You could say it's useful for the speed; I haven't compared it to RE-105 or anything. But if you're a serious miner looking to be eco, better to dish out another 1k and get an adjusted drill.
The finder can be useful in the right hands. Decent base depth means you need less enhancers to hit 800+ depth. It's mainly for convenience and precision depth control/testing.
Grabbing high depth (L) Finders is generally cheaper than using enhancers, but then you're reliant on the auction/crafters. Enhancers are generally easier to come by than a low priced Terramaster 6/7 (L) and they last a very long time on UL finders. Also you may not meet the skill requirement to use high level Terramasters, in which case enhancers/UL finder is your best option if you want to play around with high depth.
In terms of "is it eco?" well that's up for debate. Generally most seasoned miners will tell you finder decay is returned in loot so there is no such thing as an "eco " finder. This has yet to be proven with hard data, it's more of a consensus based on anecdotes.
To be perfectly honest, it's not much better than F-105. Unless you need that extra depth regularly and want to save a bit on enhancer burn.