Nissan Altima: 93 Nissan -- starting problem

I have some starting problem in my car from long time.
Suddenly It did not start but wipers, radio and other accessories were
working. Sometimes I heard some click during turn on car. From last two
time we had to give PUSH to car and it started.

Initially serviceman thought that there was some problem in battery so we
replaced the battery and we also checked basic starting system. Everything
looked fine.

So I am tired now to spend 75$/hour service charge to just check car and
towing expense and come with nothing. I guess serviceman does not figure
out problem.

Any advice will be appreciated.

Thank you,

Pratik

Could be problem with starter, might be intermittent and heat related. If
same problem with battery, check cables, starter.
Hearing clicking sound, sound like bad starter.