So the navy will maintain a big, modern fleet out of the regular naval budget and of course there is alway the option in terms of money and industry to have another building spurt if the political situation demands it. The horse thing is a good point, motorisation could amerliorate that and I'd guess that that would become apparent in 1914-15 leading to bigger orders for trucks and maybe armoured cars and artillery tractors.
WW1 showed that an Army (Corps whatever) could operate up to 100 miles from the railhead with horse transport, so how much motorisation is required to operate at 150 miles or 200 miles? Once this threshold is reached will the srategy change? Perhaps for example the Germans could motorise 1st and 2nd Armies, deploy them to the east and give them objectives deeper than conventional wisdom believes possible. That could be the German edge, getting deep into Poland and disrupting Russian mobilisation. Just throwing it out there, feel free to object.