Power gain time frame? Tips?

So back about a year ago (Oct 2012) I had a FTP of 247, using TrainerRoads 20 minute test. Since then though, school, kids, health issues, have all impacted my training. Recently I resumed indoor training (it's cold here!) and did some Sufferfest vids. I noticed that my HR to power levels are way, way down. I will do an FTP test next week, but I bet it will be near 200, 210 at best.

I want to get back to 247, or even past it by Spring 2014. But I am not sure what I need to do or if this is even a realistic goal. Prior to hitting 247, I had been training pretty hard for triathlons. I was riding about 75 to 100 miles per week, running 25 to 35 miles, and swimming about 2 miles.

I plan on resuming running and swimming on off biking days. I think both really helped to lower my max HR numbers. Both though, would be really slow, almost recovery type runs and swims. I don't have enough time to hit my prior volume when doing triathlon training.

My cycling days, since I will be inside, will mostly involve a couple 1 to 2 hour Sufferfest vids or some long endurance free rides while watching a movie. Likely 3 rides per week. My running and swimming can be altered. I don't have any time or distances set. Since I want to focus on cycling, then running and swimming can be altered to whatever best suits my cycling goals.

Oh, up to this point, I still had been getting in cycling each week, maybe 30 to 50 miles. So I have a base fitness. I did 40 miles the other day and didn't bonk out. But it wasn't nearly as fast as 2012's 40 milers, that's for sure.

So my questions are: 1. Can I hit 247 FTP by Spring 2014 (or sooner)? 2. Should I bother running and swimming, or just totally sell out on cycle training? 3. What types of cycling plans/tips/training sessions/etc would you all advise? 4. What type of volume should I commit to percentage wise for each sport per week? Like 75% time cycling, 15% running, 10% swimming (I just made these up, just to give an idea).

Thanks!