I recommend being gentle but very helpful and consistent. Explain to them in different ways that they need to look at this business as their own business and every dollar they spend is a small investment in their business.
It is important you do not turn them off where they feel like that is all you want from them. Show them that you are investing in this business yourself and that you are making strides to hit your goals every step of the way.
With a little encouragement and being a good example, the individuals that are serious will realize that investment (time and money) is truly needed to be successful in any business venture.
I recommend being gentle but very helpful and consistent. Explain to them in different ways that they need to look at this business as their own business and every dollar they spend is a small investment in their business.
It is important you do not turn them off where they feel like that is all you want from them. Show them that you are investing in this business yourself and that you are making strides to hit your goals every step of the way.