Very creative work!
I would never suggest setting up with modified hotshoe flashes (the Strobist Doctrine) for portrait work unless you ABSOLUTELY need the portability hotshoes provide.
Any studio flash, including the Chinese eBay versions, would be superior to hotshoe modifications. Because of:
1. Modeling light capability
2. Usually considerably higher power
3. Modeling light capability
4. Better use of light modifiers
5. Modeling light capability
6. Steady recharge times because of A/C power
7. Modeling light capability
8. They fit on stands without modifying accessories
Oh yes, did I mention... The stydio flash is better for portraiture because of its modeling light capability. You have What You See Is What You Get ability...
You CAN achieve decent lighting with hotshoe flashes, McNally does! But, you can also boil ice cubes to make tea. It is possible but, certainly not the most efficient method of making a cup of tea!
Continuous lighting needs to be bright which is often uncomfortable for humans (especially babies).
Adorams Flashpoint Monolight setups are qite decent for the price...