I have an M20E and it's not a 4-place plane even for someone as short as OP. The useful load is not there. I only have 880 lbs. With 30 gallons of gas, it's only 175 lbs per person. Although with $150k to throw at this project, he does not need to limit himself to an M20E. But a J isn't going to carry much more. The gross is only bumped on it by 165 pounds and the longer fuselage is heavier. Also, I'm not making 150 knots unless at 2700 rpms and down low, burning 13 gph at best power. 150 kt at 10 gph is pure fantasy. Well, a J can do it. M20E - no way.