Metta meditation ever taught to householders? Are there references that the Buddha taught such as metta-meditation to householders (wordlings, without complete Sila), giving ground for hypocritical practice, agree with such, in manners of: "There is the case where a householder..."?

Didn't he not focused on getting right view and Silas first?

Was modern householder-metta-meditation ever taught, even trained by the elders, such as doing it inbetween business as usual?

[Note: this is not given for trade, exchange, stacks and to maintain houses but for liberation and with non-hypocratical metta: may all beings give causes to find there way out for themselves with ease.]
Here's one about householders and the four pleasant mental abidings. But I think this refers to the four rupa jhanas rather than the four brahmaviharas.

From Gihi Sutta (AN 5.179):


  Then Anathapindika the householder, surrounded by about 500 lay
  followers, went to the Blessed One and, on arrival, having bowed down
  to him, sat to one side. So the Blessed One said to Ven. Sariputta:
  “Sariputta, when you know of a householder clothed in white, that he
  is restrained in terms of the five training rules and that he obtains
  at will, without difficulty, without hardship, four pleasant mental
  abidings in the here &amp; now, then if he wants he may state about
  himself: ‘Hell is ended; animal wombs are ended; the state of the
  hungry shades is ended; states of deprivation, destitution, the bad
  bourns are ended! I am a stream-winner, steadfast, never again
  destined for states of woe, headed for self-awakening!’


Not metta specifically but I can find a sutta where the Buddha recommended some lay people to allocate some time to practice jhana meditation.

From the Piti Sutta (AN 5.176):


  Then Anathapindika the householder, surrounded by about 500 lay
  followers, went to the Blessed One and, on arrival, having bowed down
  to him, sat to one side. As he was sitting there the Blessed One said
  to him, “Householder, you have provided the community of monks with
  robes, alms food, lodgings, &amp; medicinal requisites for the sick, but
  you shouldn’t rest content with the thought, ‘We have provided the
  community of monks with robes, alms food, lodgings, &amp; medicinal
  requisites for the sick.’ So you should train yourself, ‘Let’s
  periodically enter &amp; remain in seclusion &amp; rapture.’ That’s how you
  should train yourself.”