I guess the question would be, why spend so much on the Spider if you needed a wagon?
Solution: sell the Accord and buy a 156 Sportwagon (cheaper).
Or keep what you have, does the Accord need some improvements? Maybe once you've treated it like the Spider, you'll want to keep it
for example have you refurbed its wheels and does it have a leather interior? Is the engine a VTEC or 'standard' 2.2, how are the rocker clearances (they get noisy with age but respond well to fettling), auto or manual... what about new shocks and control arms, surely scope for improvements somewhere
I spent most of the last two weeks 'restoring' a 1995 FIAT Punto 55. The full strip and respray was worth about double the market value, but it's pretty special now (and still only a Punto 55). My friend has had it for 17 years (his only car), parents bought it brand new. Obviously, such a car is difficult to replace; like selling a child!
It's possible to spend almost nothing on keeping an old car on the road (my 164 has had only an oil change in the last two years, I've overlooked its flaking clearcoat and faded interior.) But sometimes, loyalty pays... I think you should persevere with the Accord. A friend had one and it seemed quite rewarding.
And at least by keeping the Spider, you won't be spending any more on it?