jumpstarter

i am driving pilot for 3 years now and it has been pure pleasure. never have i had to spend a single penny in any unforeseen repairs on this car but recently i have faced with an issue which has taken me aback there is a small leak under the car and on investigation we found out that its a coolant leak for which i will be spending 5k on fixing this. i am not in a state to fix i right now so i took my car to another mechanic who says i can delay the fixing of this problem the only thing i would have to do is keep an eye on the coolant and thermostat. are there any experts who can assure that mechanic no 2 is giving me correct advise or not ?