JJ and FL,
ProteinFactory.com has great whey isolate powder (click on Protein on left end of grey bar) We never use it in anything hot as my husband feels that hurts the protein. He buys the full bag as it comes to them (33 kilos I think) and it costs us around $400 but we go through it in 3 months or so, 2 to 3 shakes a day. The 1 lb bag says it has 15 serving of 27g protein - costs from $8 to $13 depending on which one. They have a $10 bag for $40 but it only has 24g protein per serving - come in chocolate and vanilla.
Also dietdirect.com has liquid protein in 30 oz bottles in a few flavors - 15 to 18 g protein per ounce. I'm going to try this next time I get something from them. I only bought their HNSs when they were on sale for $7.99, I got enough to get 10% off and free shipping. Otherwise, you are right, JJ, might as well get from MRC. I purchased pretty much everything from MRC for the first 3 months - then I added up all I had spent (

) That's when I ordered from dietdirect! and I've bought very little from MRC since.
I think once you have the plan under control, you could continue losing weight on your own. As FL said, she is not buying anything other than HNSs. The biggest problem I can see is the psychological problems that cause poor eating choices. If you have a better way of getting counselling than MRC, or feel you have worked through these issues and just need occasional support, 3FCs has so many support threads - I just found a maintainers thread not connected with MRC but people who have lost weight and kept it off using many different methods.
Oh yeah, I learned something the other day at MRC - their meals are designed to give us 60% protein, 20% carb, 20% fat at each meal - I had not realized that. I have been trying to relate that to what I am eating on maintenance now and realized I never got anywhere near that much protein when I was trying to lose weight on my own. So, yes, If you can get enough protein and keep the fats and carbs low enough and still get enough of the right kinds of fats, you can certainly continue to lose weight on your own.
Keep us informed as to what you decide - Get as much from and out of MRC as you can - you have paid for it up front - They'll cut you off eventually when you can't give them anymore money - until then, take advantage of their services. Happy Holidays, jeanette