Re: Rigging up an A-sail
It looks like your forestay goes to the stemhead or very close. Presumably there is something there for an anchor roller to which you can attach a pulley for the tack line. You may have to as I did have a small extension to this made but this was to get some separation for a furler.
A furler has some advantages, but also means the tack line is fixed in length which is ok but not optimal for racing.
You also need to clear the pulpit. That would probably mean that the tack is not attached directly to the stemhead, rather the tack line allows it to project out and up. To me that is an advantage as a cruiser in terms of visibility.
To a racer you would probably want a smallish removable prod. Harken make them in various sizes. You would probably need to reinforce the deck where it attaches.
On that size boat the forces would be substantial at all 3 points tack head and clew. However since you are obviously prepared to spend money on racing that may be your best option.