Mixing speedlights and studio lights

[coldpenguin]

So currently I am using 2 off-camera flashes, and an on camera flash. I would like to add a third-off camera, but, for the price of a 'decent' flash, I could get three ebay 'studio' strobes with softboxes and umbrellas and background, or two 'decent' studio lights with umbrellas.

If I were to go for the two 'decent' studio lights, although it isn't ideal, could I easily mix and match these with my current flashes?

I use the Canon 7d as a 'controller' and one remote flash in canon wireless, and one Yongunuo flash in S1 mode (delayed flash after pre-flash). (The advantage of this mode, is that although the camera commands the flash by flashing, it doesn't have to have a flash in the image).
I believe that most studio lamps have a 'flash on flash' option, do they have a similar delayed/ignore pre-flash option?
Or would I need to get two more wireless triggers just to use the speedlights? I suspect that to begin with, I would use the speedlights as just background lighting, if I can afford a background. (although with three studio lights I would rather do something more creative).
This is just for fun portraits of my child and family (as the baby is quite young, waiting is 'painful' with missed oportunities )

 

[Garry Edwards]

The problem with any chain is that it's only as strong as its weakest link, and the weakest link on hotshoe flashguns is the slow recycling. This won't in fact be a problem if you decide to get cheap fleabay lights, because the recycling on those is pretty dire too - but you will definitely notice the difference if you get decent studio flashes. This really does matter when photographing young kids, expressions change in an instant and you need the flash to be ready when they do...
Some studio flashes do have a mode that ignores the first flash if set, but it doesn't really matter, it's easily overcome simply by having a receiver fitted to each head and turning the slave cells off - although turning the slave cells off may not be an option with the very cheapest flash heads - note that I said "the very cheapest flash heads", I didn't say "fleabay junk"