My thought is - start training right away. Train those 2 the whole season. Save money and before the playoff you can buy a replacement for your PF who is old. At that time you'll have young trained guys and PG, SG veterans at your disposal and below the rim you'll have your 34 years old PF and a new one you bought.
In season that follows, get rid of your (now 35 years old) PF (you have a replacement) and get rid of your old PG and SG (you have 2 trainees which will replace them).