I'm planning to tow a center console tender and have been doing my research. I've found great information on the line materials, bridle setup, towing distance, tow eyes and such. What I haven't found is a rule of thumb for various ratios of the towing boat to tender. I'm sure this is dependent on multiple factors excluding conditions: vessel size, cruising speed, engine size and fuel burn. I'm looking for ~55-65ft motor yachts and hoping to cruise around 18-20knots, we have the list of potential vessels narrowed down. I was originally planning to tow something in the 23ft, 5000lb range which shouldn't be a problem. However the tender size is now creeping up toward 27ft and 8000lbs loaded as I consider something more useful when we're at home. I recently put an offer in on a smaller main vessel (52ft) which didn't go through, but I realized it would completely alter my towing expectations, perhaps down to 20ft and maybe not at all. So I'm looking for some rough rules of thumb, if they exist, from people who have done this before. If the opportunity pops up to buy a center console, I don't want to mistakenly get one that's too big or undersized. As an example, a neighbor in my marina has a 52ft Viking and has towed a 21ft Regulator (4000lbs) successfully around 20 knots with his typical cruise being 28-30 knots. It seems to me this is probably easier on a 60ft-ish convertible as you could just back down the cruising speed depending on the center console size and still get them both planing?