It is good to know that you and your wife are people who are willing to invest their money in their neck up. Most people only invest in their neck down. However, I will definitely advice you against the idea of asking your downlines to sign up for the training of course especially when you know it is a MLM company.
These are the following rules I keep myself:
1. I avoid using external trainers when it comes to training my group and do not allow my leaders to invite them too. Most of these trainers do not even have an MLM business or at best are failures in their own MLM business and that is why they end up as trainers teaching other people's group. What can these people teach? The ones who can are busy teaching their own organizations.
2. However, I do advice you to attend the training yourself. I attend training lessons myself too and teach my group what I have learned when I come home. All good MLM trainers must attend training or read/listen to personal self-improvement books/tapes. After that, they must add their own MLM experience and stories and teach down.
I sometimes allow my very high pins to attend these training but they must not bring their downlines. When they attend these training, they are advise not to leave their personal information (telephone/email/address) to the trainers or company who will tell them they need those information for follow up. Remember these companies are also looking for good trainers to do their work. Believe me, I am talking from experience. I have lost a few good trainers to these companies.
3. Two other things I find in some of these training.
a/ Some are too detailed and are hard to duplicate.
b/ Some are only theories and the trainers are teaching what they think is the right answer. I was the Managing Director of one of the largest MLM Company in the world and during one of our International Rally we invited a very well known speaker. He went on stage and talked about how he dislike selling and that selling is not important. He was very good and convincing and after his training, I have to spend time with my leaders to clean up the mess he left behind.