I've been looking to get a dedicated road bike for a while, and last week I got to mess around with someone's Specialized that he had put some Shimano tourney levers on and fell in love with them. However, I'm also on a pretty tight budget.

I've seen some used bikes around that fit most of my criteria (700c, aluminum frame, etc) but almost all were hybrids and came with flat bars. For some reason I find drop-bars wayyy more comfortable, at least for me, and was wondering just how tough it would be to install a set of drop bars and these shifters: Amazon.com : Shimano Tourney ST-A070 3 x 7-Speed STI Lever Set : Bike Shift Levers : Sports & Outdoors

Sorry if this question has been asked before, I did some searching and couldn't find much. Any advice would be much appreciated, and thanks in advance!