Although it is very fun, photography and flyfishing are an affordable hobby,
What is your definition of affordable? I've got some serious chump change put into the photography, and it is starting to add up with the flyfishing.

RC anything is not. I have been involved in it, and it is a money pit with no bottom.
Amen brother - that is why I stopped that before it got too big. first planes were control line (pre RC) First RC plane - maiden flight - launched it - up elevator - stalled - nosedived into the ground 20' from where I launched it - very short flight! Pretty hard to take after the hours of building (pre ARF or RTF). What I wanted to do would have cost countless hours and mucho dinero with the big radios, retractable landing gear, radial engines, ducted fans, etc.... Can't imagine what it would cost now, with the more sophisticated radios, turbine jets, scale engines, etc..... I did not want to devote my life to the RC - had other things I wanted to do, plus splashed some of the fuel into my eyes because of a stupid accident with a glo plug. That stuff is nasty bad!