Más féidir dul amú leis aon ní/rud ar bith, is féidir é - (is my attempt at it)

Would Murphy's Law be - Dlí Uí Mhurchadha ?
and O'Tool's Commentary - Tráchtaireacht Uí Thuathail ?

- Tráchtaireacht Uí Thuathail fén Dlí Uí Mhurchadha: Bhí Ó Murchadha soirbhíoch.

At the other place they had -

Más féidir le haon rud dul amú, is amhladh a bheidh sé.

Más féidir le haon rud dul amú, raichaidh sé amú.

and -

Pé/Cibé rud ar féidir leis dul as fearas, rachaidh sé as fearas.

Here's another one -

Horse sense is the thing a horse has which keeps it from betting on people. (W.C. Fields)

Last night I dreamed I ate a ten-pound marshmallow, and when I woke up the pillow was gone. (Tommy Cooper)
- Bhí taibhreamh agam aréir go raibh bhí mé ag ithe leamhachán deich bpunt agus nuair dhúisigh mé, d'imigh an piliúr as radharc.

What a man needs in gardening is a cast-iron back with a hinge in it. (Charles Dudley Warner)
Is gá an rud leis an fear nuair bhfuil sé ag garraíodóireacht, droim iarainn múnla agus tuisle ann.

I'm not quite sure I've got this right, but anyway -
Is an rud ciall capaill a bhfuil capall aige a bhac a chur é geall a chur ar dhaoine.

I'm a (rusty) beginner, but I think something more along these lines:

Rinneadh taibhreamh dom aréir gur ith mé leamhachán deich-bpunt, agus, nuair a dhúisigh mé, bhí an piliúr imithe.

Would love feedback.

(So would I)

Here's another one -

Any girl who wants to be sure she will never be unemployed should marry a farmer.

Is mian le haon cailín a bheith cinnte ní bheadh sí choíche díomhaoin, ba cheart a phósta leis an fheirmeoir. (is my attempt)

And I'm not quite sure how to put this into Irish either -

Whoever said money can't buy happiness didn't know how to shop. - An té or Pé ?