11th May Running to Athens

The thing is I've forked out a sack of money for that Alpine Mountaineering Course in a rabid reaction to one disturbed night on Ward 4 PRI....
Having signed up, an equipment list to rival the sports gear requirement for Eton College arrived. So far I've got an ice axe of the requisite length from Errol car boot sale but that still leaves a considerable deficit of essential life preserving items.
The money would definitely be a complete waste without any attempt at a prior improvement to the Cardiovascular System, due to the inevitable increased demand for oxygen. Bearing this in mind a rigid training schedule has been instituted that follows a simple algorithm based on some character in Greek mythology. This chap was said to be strong enough to lift a bull. How did he train? Well he started with a new born calf apparently and set himself the daily task of hoisting this bovine off the ground and so as it grew, Theo's strength followed likewise.
So the Greek regime involves running in the gathering dusk then turning round and running back in the dark (this cleverly avoids meeting Brendan or any other dog walkers, because anyway he'll only ask me when I'm going to do his boiler flue). Now allowing one day for recovery (I think Theo made a mistake there), the trick is to increase the turn around point by about 200 yards on each occasion. Through a process of extrapolation the results can be predicted thus.
Theo increases his run by 2 x 200 yards every other day. How many weeks training would he require to be able to complete an ultra-marathon to Athens, a distance of 3890 kms?
First multiply 3890 x 0.624 to give miles =2427 miles then x 1760= 4,272,153 yds
Distance increase per day = 200 yards
therefore number of days = 4,272.153/200=21360 days /7 = 3051 weeks or 58 years. This can't be right because what happens to the schedule when it takes more than 2 days to turn around and run back?
If Theo jogs at 5 miles an hour in 48 hours he will have run 240 miles without stopping to eat. Therefore turning around at any point further than 120 miles from home requires that he would have to set off again on the next training session before he arrived back, thus causing a rupture in the space-time continuum ......